zhengshiJ commented on a change in pull request #7357: URL: https://github.com/apache/incubator-doris/pull/7357#discussion_r775406819
########## File path: fe/fe-core/src/main/java/org/apache/doris/rewrite/InferFiltersRule.java ########## @@ -0,0 +1,302 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +package org.apache.doris.rewrite; + +import org.apache.doris.analysis.Analyzer; +import org.apache.doris.analysis.BinaryPredicate; +import org.apache.doris.analysis.CompoundPredicate; +import org.apache.doris.analysis.Expr; +import org.apache.doris.analysis.IsNullPredicate; +import org.apache.doris.analysis.JoinOperator; +import org.apache.doris.analysis.LiteralExpr; +import org.apache.doris.analysis.SlotRef; +import org.apache.doris.common.AnalysisException; +import org.apache.doris.common.Pair; + +import com.google.common.collect.Sets; + +import org.apache.logging.log4j.LogManager; +import org.apache.logging.log4j.Logger; + +import java.util.ArrayList; +import java.util.Set; + +/** + * The function of this rule is to derive a new predicate based on the current predicate. + * eg. + * t1.id = t2.id and t2.id = t3.id and t3.id = 100; + * --> + * t1.id = 100 and t2.id = 100 and t3.id = 100; + * + * 1. Register a new rule InferFiltersRule and add it to GlobalState. + * 2. Traverse Conjunct to construct on/where equivalence connection, numerical connection and isNullPredicate. + * 3. Use Warshall to infer all equivalence connections + * 4. Construct additional numerical connections and isNullPredicate + */ +public class InferFiltersRule implements ExprRewriteRule { + private final static Logger LOG = LogManager.getLogger(InferFiltersRule.class); + public static InferFiltersRule INSTANCE = new InferFiltersRule(); + + @Override + public Expr apply(Expr expr, Analyzer analyzer) throws AnalysisException { + if (expr == null) { + return null; + } else if (!analyzer.enableInferPredicate()) { + return expr; + } else { + ArrayList<Expr> slotEqSlotPredicatesList = new ArrayList<>(); + Set<Pair<Expr, Expr>> slotEqSlotPredicatesSet = Sets.newHashSet(); + ArrayList<Expr> slotToLiteralPredicatesList = new ArrayList<>(); + Set<Pair<Expr, Expr>> slotToLiteralPredicatesSet = Sets.newHashSet(); + ArrayList<Expr> newPredicatesList = new ArrayList<>(); + ArrayList<Expr> isNullPredicatesList = new ArrayList<>(); + Set<Expr> isNullPredicatesSet = Sets.newHashSet(); + + initAllStructure(expr, slotEqSlotPredicatesList, slotEqSlotPredicatesSet, + slotToLiteralPredicatesList, slotToLiteralPredicatesSet, + isNullPredicatesList, isNullPredicatesSet); + + inferSlotPredicates(slotEqSlotPredicatesList, slotToLiteralPredicatesSet, + slotToLiteralPredicatesList, newPredicatesList, analyzer); + + inferIsNullPredicates(slotEqSlotPredicatesList, isNullPredicatesList, + isNullPredicatesSet, newPredicatesList, analyzer); + + if (!newPredicatesList.isEmpty()) { + Expr rewriteExpr = new CompoundPredicate(CompoundPredicate.Operator.AND, expr, newPredicatesList.get(0)); + for (int index = 1; index < newPredicatesList.size(); index++) { + rewriteExpr = new CompoundPredicate(CompoundPredicate.Operator.AND, rewriteExpr, newPredicatesList.get(index)); + } + return rewriteExpr; + } + } + return expr; + } + + private void initAllStructure(Expr conjunct, + ArrayList<Expr> slotEqSlotPredicatesList, + Set<Pair<Expr, Expr>> slotEqSlotPredicatesSet, + ArrayList<Expr> slotToLiteralPredicatesList, + Set<Pair<Expr, Expr>> slotToLiteralPredicatesSet, + ArrayList<Expr> isNullPredicatesList, + Set<Expr> isNullPredicatesSet) { + if (conjunct instanceof CompoundPredicate) { + for (int index = 0; index < conjunct.getChildren().size(); ++index) { + initAllStructure(conjunct.getChild(index), slotEqSlotPredicatesList, + slotEqSlotPredicatesSet, slotToLiteralPredicatesList, + slotToLiteralPredicatesSet, isNullPredicatesList, isNullPredicatesSet); + } + } + if (conjunct instanceof BinaryPredicate) { + Pair<Expr, Expr> pair = new Pair<>(conjunct.getChild(0), conjunct.getChild(1)); + Pair<Expr, Expr> eqPair = new Pair<>(conjunct.getChild(1), conjunct.getChild(0)); + if (conjunct.getChild(0) instanceof SlotRef + && conjunct.getChild(1) instanceof LiteralExpr) { + if (!slotToLiteralPredicatesSet.contains(pair) + && !slotToLiteralPredicatesSet.contains(eqPair)) { + slotToLiteralPredicatesSet.add(pair); + slotToLiteralPredicatesList.add(conjunct); + } + } else if (conjunct.getChild(0) instanceof SlotRef + && conjunct.getChild(1) instanceof SlotRef) { + if (!slotEqSlotPredicatesSet.contains(pair) + && !slotEqSlotPredicatesSet.contains(eqPair)) { + slotEqSlotPredicatesSet.add(pair); + slotEqSlotPredicatesList.add(conjunct); + } + } + } else if (conjunct instanceof IsNullPredicate) { + if (!isNullPredicatesSet.contains(conjunct.getChild(0))) { + isNullPredicatesSet.add(conjunct.getChild(0)); + isNullPredicatesList.add(conjunct); + } + } + } + + private void inferSlotPredicates(ArrayList<Expr> slotEqSlotPredicatesList, + Set<Pair<Expr, Expr>> slotToLiteralPredicatesSet, + ArrayList<Expr> slotToLiteralPredicatesList, + ArrayList<Expr> newPredicatesList, + Analyzer analyzer) { + ArrayList<Expr> tmpSlotToLiteralPredicatesList = new ArrayList<>(); + for (Expr slotToLiteral : slotToLiteralPredicatesList) { + buildNewBinaryPredicate(slotToLiteral, slotEqSlotPredicatesList, slotToLiteralPredicatesSet, + newPredicatesList, tmpSlotToLiteralPredicatesList, analyzer); + } + + int tmpSize = 0; + do { + int startSize = tmpSlotToLiteralPredicatesList.size(); + + for (int index = 0; index < tmpSlotToLiteralPredicatesList.size(); ++index) { + Expr slotToLiteral = tmpSlotToLiteralPredicatesList.get(index); + buildNewBinaryPredicate(slotToLiteral, slotEqSlotPredicatesList, slotToLiteralPredicatesSet, + newPredicatesList, tmpSlotToLiteralPredicatesList, analyzer); + } + + for (int index = 0; index < newPredicatesList.size(); ++index) { + Expr slotToLiteral = newPredicatesList.get(index); + buildNewBinaryPredicate(slotToLiteral, slotEqSlotPredicatesList, slotToLiteralPredicatesSet, + newPredicatesList, tmpSlotToLiteralPredicatesList, analyzer); + } + + int endSize = tmpSlotToLiteralPredicatesList.size(); + tmpSize = endSize - startSize; + + } while (tmpSize != 0); + } + + private void buildNewBinaryPredicate(Expr slotToLiteral, + ArrayList<Expr> slotEqSlotPredicatesList, + Set<Pair<Expr, Expr>> slotToLiteralPredicatesSet, + ArrayList<Expr> newPredicatesList, + ArrayList<Expr> tmpSlotToLiteralPredicatesList, + Analyzer analyzer) { + SlotRef checkSlot = slotToLiteral.getChild(0).unwrapSlotRef(); + for (Expr conjunct : slotEqSlotPredicatesList) { + SlotRef leftSlot = conjunct.getChild(0).unwrapSlotRef(); + SlotRef rightSlot = conjunct.getChild(1).unwrapSlotRef(); + + if (checkSlot.simple_equals(leftSlot)) { + addNewBinaryPredicate(genNewBinaryPredicate(analyzer, slotToLiteral, rightSlot), + slotToLiteralPredicatesSet, newPredicatesList, + tmpSlotToLiteralPredicatesList, + isNeedInfer(checkSlot, rightSlot)); + } else if (checkSlot.simple_equals(rightSlot)) { + addNewBinaryPredicate(genNewBinaryPredicate(analyzer, slotToLiteral, leftSlot), + slotToLiteralPredicatesSet, newPredicatesList, + tmpSlotToLiteralPredicatesList, + isNeedInfer(checkSlot, leftSlot)); + } + } + } + + private boolean isNeedInfer(SlotRef checkSlot, SlotRef newSlot) { + JoinOperator jop = newSlot.getDesc().getParent().getRef().getJoinOp(); Review comment: Re-adjusted the rules of predicate derivation, considering on_clause and where_clause separately -- This is an automated message from the Apache Git Service. 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